On Tue, 10 Jul 2018, Madhav Chauhan <madhav.chauhan@xxxxxxxxx> wrote:
> This patch programs the time (in escape clocks) to drive
> the link in the initialization (i.e. LP-11) state.
>
> v2: Rebase
>
> Signed-off-by: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/icl_dsi.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
> index 41faa19..bc27e34 100644
> --- a/drivers/gpu/drm/i915/icl_dsi.c
> +++ b/drivers/gpu/drm/i915/icl_dsi.c
> @@ -270,6 +270,22 @@ static void gen11_dsi_enable_ddi_buffer(struct intel_encoder *encoder)
> }
> }
>
> +static void gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
> +{
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
> + u32 tmp;
> + enum port port;
> +
> + /* Program T-INIT master registers */
> + for_each_dsi_port(port, intel_dsi->ports) {
> + tmp = I915_READ(ICL_DSI_T_INIT_MASTER(port));
> + tmp &= ~MASTER_INIT_TIMER_MASK;
> + tmp |= intel_dsi->init_count;
> + I915_WRITE(ICL_DSI_T_INIT_MASTER(port), tmp);
> + }
Mmh, the high word is MBZ so the RMW is unnecessary. But *shrug*.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> +}
> +
> static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder)
> {
> /* step 4a: power up all lanes of the DDI used by DSI */
> @@ -283,6 +299,9 @@ static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder)
>
> /* step 4d: enable DDI buffer */
> gen11_dsi_enable_ddi_buffer(encoder);
> +
> + /* step 4e: setup D-PHY timings */
> + gen11_dsi_setup_dphy_timings(encoder);
> }
>
> static void __attribute__((unused))
--
Jani Nikula, Intel Open Source Graphics Center
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